Merge pull request #3677 from FernandoS27/better-sync

Introduce Predictive Flushing and Improve ASYNC GPU

1 files changed, 29 insertions, 0 deletions

diff --git a/src/video_core/gpu.h b/src/video_core/gpu.h
index 1a2d747be..5e3eb94e9 100644
--- a/src/video_core/gpu.h
+++ b/src/video_core/gpu.h
@@ -155,7 +155,23 @@ public:
     /// Calls a GPU method.
     void CallMethod(const MethodCall& method_call);
 
+    /// Flush all current written commands into the host GPU for execution.
     void FlushCommands();
+    /// Synchronizes CPU writes with Host GPU memory.
+    void SyncGuestHost();
+    /// Signal the ending of command list.
+    virtual void OnCommandListEnd();
+
+    /// Request a host GPU memory flush from the CPU.
+    u64 RequestFlush(VAddr addr, std::size_t size);
+
+    /// Obtains current flush request fence id.
+    u64 CurrentFlushRequestFence() const {
+        return current_flush_fence.load(std::memory_order_relaxed);
+    }
+
+    /// Tick pending requests within the GPU.
+    void TickWork();
 
     /// Returns a reference to the Maxwell3D GPU engine.
     Engines::Maxwell3D& Maxwell3D();
@@ -325,6 +341,19 @@ private:
 
     std::condition_variable sync_cv;
 
+    struct FlushRequest {
+        FlushRequest(u64 fence, VAddr addr, std::size_t size)
+            : fence{fence}, addr{addr}, size{size} {}
+        u64 fence;
+        VAddr addr;
+        std::size_t size;
+    };
+
+    std::list<FlushRequest> flush_requests;
+    std::atomic<u64> current_flush_fence{};
+    u64 last_flush_fence{};
+    std::mutex flush_request_mutex;
+
     const bool is_async;
 };